Toolholder



April 25, 1950 L. J. STIBITS 2,505,013

TOOLHOLDER Filed April 25, 1946 INVENTOR; LEW/5 d. ST/B/Ts.

ATTORNEY Patented Apr. 25, 1950 UNITED STATES PATENT OFFICE TOOLHOLDER Lewis J. Stibits, Philadelphia, Pa.

Application April 25, 1946, Serial No. 664,873

(Granted under the act of March 3, 1883, as amended. April 30, 1928; 370 0. G. 757) 7 Claims.

Thisinvention relates to an adjustable'drillholder.

Morespecifically this invention relates to a holder for a portable pneumatic or other type drill that enables the operator to drill accurately at an angle, particularly in drilling packingplunger holders for watertight doors and hatches.

An object of this invention is to provide a drillholder that will allow accurate drilling at an angle.

Another object isto provide a drill-holder that is simple to operate, is adjustable readily, and guides. the drill'with accuracy.

Further obiects and advantages of this invention, as well as its construction, arrangement and operation, willbe apparent'from the following description and claims in connection with the accompanying drawing, in which Fig. 1 is aside elevational view of a drill-holder in operating position, the drill being shown in phantom lines; and I Fig. 2 Ba partial view in vertical cross-section, similar to Fig. 1. showing a positioning member, a boss, anda drillguide'bushin g;

Fig. .1 shows. .a preferred embodiment of the invention wherein. drill-fixture I is shown in operating position and secured to the work, in this case door I l, which has holes l3 therein and bosses 3-l integral therewith. The threaded posi tionin-g-member or. plugv I2: passing through one of holes I3' is mountedremovably to door 1'] by means of nut M.

The positioning-member [2 has a shoulder 38 and a top 39 in the general shape of a frustum of a cone.

The upper portion of the shaft l2 has arm [5 extending horizontally and arm I! extending vertically therefrom. Arm I5, integral with shaft l2, has at its extremity integral lug 34 and bolt I6. Vertical arm I1 is mounted rotatably upon the upper surface of shaft l2 by bolt 33, which passes through lug 31 integral with shaft 12. Arm I1 is bifurcated to permit rod It to pass therethrough. Rod I8 is attached rotatably to horizontal arm l5 by bolt l6. Locating holes or perforations l9 in arm I! and red It are adapted to fix the angle of drill 20. Bolt 32 passing through holes l9 secures rod l8 to arm l'l.

Mounted slidably on rod it! are drill-holders 2! and 22 with set-screws 23 provided thereon in order to permit positioning of drill 2!). Drillholder 2| has recess 24 therein to permit the insertion of drill handle 25. Drill-holder 22 has adjustable arm 26 received therein and secured by set-screw 21. Ann 26 has a bore 28 which receives threaded drill guide or bushing 29, which isheld in place by set-screw 30.

It can be seen from the above that when boss 3! is to be drilled, the fixture I0 is secured to the door II by means of lock-nut 14 in such a position as to place tool-holders 2i and 22 and boss 3! in the same vertical plane. A limited choice of vertical angular adjustment is obtainable by matching holes 19 in rod l8 and arm I! and securing these members b bolt 32.

By placing the drill 20 between the holders 2| and 22, inserting handle 25 in recess 24 of drillholder 2 l, the drill 2!] is held firmly in place. The drill-bit 35 of drill 29 is inserted in the bushin 29. In the operation of the invention, the drillbit 35 is progressed forward by turning the internally threaded handle 25 to permit drilling of bore 36-.

Various modifications'and changes can be made in the subject device without departing from the scope of the invention.

The invention described herein may be manufactured and used by or for the Government of the United States of America for governmental purposes without the payment of any royalties thereon or therefor.

I claim:

1. A tool-holder comprising a support. means to secure said support to the work. a first arm fixed to said support, a second arm mounted rotatably on said support. an elongatedguide-rod, said guide-rod, being mounted rotatably on said first arm, said guide-rod and said second arm having perforations, a bolt passing through a perforation in said second arm and said guiderod, tool-holders mounted slidably on said guiderod. means to secure said tool-holders on said guide-rod. one of said tool-holders having a third arm mounted slidably therein, and a guide bushing in said third arm.

2. A drill-holder comprising a generally cylindrical support, said support having a threaded end. a mid portion and a shoulder above said mid portion, a to portion above said shoulder, a first arm generally normal to said support and integral with said top portion, a lug at the outer extremity of said first arm, a'guide-rod pivoted to said lug, said support having a second lug integral therewith, a second arm mounted rotatably on said second lug, said second arm having perforations, a bolt extending through a perforation of said second arm and said guide-rod, a drillholder mounted slidably on said guide-rod near the free end thereof, a second drill-holder mounted slidably at an intermediate position on said guide -rod, said second drill-holder having an extension generally normal to said guide-rod, a third arm mounted slidably in said extension and a drill-guide bushing received threadedly by said third arm, said drill-holders being adapted to clamp a drill therebetween.

3. A drill-holder comprising a first arm adapted to be secured to a workpiece at an angle thereto, a first plurality of spaced locating holes in said first arm, a second arm mounted on said first arm and extending at an angle thereto, a rod mounted on said second arm distal said first arm and rotatable in the plane of said first and second arm, a second plurality of spaced locating holes in said rod adapted to be aligned with corresponding locating holes in said first arm, means to secure a selected hole of said first plurality of holes to a selected hole of said second plurality of holes, and means to secure a drill in axial parallelism with said rod.

4. A drill-holder comprising a first arm adapted to be secured to a workpiece at an angle thereto, a first plurality of spaced locating holes in said arm, a second arm mounted on said first arm and extending at an angle thereto, a rod mounted on said second arm distal said first arm and rotatable in the plane of said first and second arms, a second plurality of spaced locating holes in said rod adapted to be aligned with correspondingly locating holes in said first arm, means to secure a selected hole of said first plurality of holes to a selected hole of said second plurality of holes, and means to secure a drill upon said rod beyond the juncture of said rod and said second arm in axial parallelism with said rod.

5. A drill-holder comprising a first arm adapted to be secured to a workpiece at an angle thereto, a first plurality of spaced locating holes in said arm, a second arm mounted on said first arm and extending at an angle thereto, a rod mounted on said second arm distal said first arm and rotatable in the plane of said first and second arms, a second plurality of spaced locating holes in said rod adapted to be aligned with corresponding locating holes in said first arm, means to secure a selected hole of said first plurality of holes to a selected hole of said second plurality of holes, and a plurality of lugs mounted slidably upon said rod beyond the juncture of said rod and said first arm, said lugs being 4 adapted to secure a drill in axial parallelism with said rod.

6. A drill-holder comprising a first arm adapted to be secured to a workpiece at an angle thereto, a first plurality of spaced locating holes in said arm, a second arm mounted on said first arm and extending at an angle thereto, a rod mounted on said second arm distal said first arm and rotatable in the plane of said first and second arms, a second plurality of spaced locating holes in said rod adapted to be aligned with corresponding locating holes in said first arm, means to secure said rod to said first arm at selected holes of said rod and said first arm, and means to secure a drill upon said rod beyond the juncture of said rod and said first arm, said means including means to vary the angular disposition of such drill relative said rod.

7. A drill-holder comprising a first arm adapted to be secured to a workpiece at an angle thereto,*a first plurality of spaced locating holes in said arm, a second arm mounted on said first arm and extending at an angle to said first arm, a rod mounted on said second arm distal said first arm and rotatable in the plane of said first and second arms, a second plurality of spaced locating holes in said rod adapted to be aligned with corresponding locating holes in said first arm, means to secure a selected hole of said first plurality of holes to a selected hole of said second plurality of holes, and a plurality of lugs mounted slidably upon said rod beyond the juncture of said rod and said first arm, at least one of said lugs having an arm mounted slidably therein, whereby the angular disposition of such drill relative said rod can be varied.

' LEWIS J. STIBITS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 652,251 Cunningham June 26, 1900 1,168,939 Evers Jan. 18, 1916 1,411,104 Hughes Mar. 28, 1922 FOREIGN PATENTS Number Country Date 378,653 Germany July 24, 1923 718,078 France Oct. 27, 1931 

